Use the following procedure to install and use Explorer from an alternate path after you have downloaded the latest installer How to Download Oracle Explorer.
Complete steps 1 - 7 in How to Install Oracle Explorer Manually.
As superuser, install Explorer using Run pkgadd -R <alternate root> -d . SUNWexplo SUNWexplu
Create default configuration file for alternate root instance as <alternate root>/etc/opt/SUNWexplo/default/explorer running <alternate root>/opt/SUNWexplo/bin/explorer -g.
To run Explorer from alternate path, use the -d option to locate the alternate default configuration file:<alternate root>opt/SUNWexplo/bin/explorer -d <alternate root>/etc/opt/SUNWexplo/default/explorer